The change isn't to prevent you from casting on your pet. It is intended to eliminate the annoying message that tells you that someone tried to cast a spell on your, but you are protected, when you are in a protected zone, such as the Nexus or PoK.
A side-effect of this change is that you can no

[quote=Byren]He is no longer at the spot on the map I show him to be, instead Killempri Razenell resides there. I also took my level 85 druid to the zone and with max tracking of 175/175, searched in vain for this NPC. He does not show up anywhere in the zone.[/quote]
He should have been listed i

Title: TDS Progression #21: A Beginning From an End
URL: http://everquest.allakhazam.com/db/quest.html?quest=7723
Task Step: Use the Observation Matrix and speak with the hologram it generates 0/1 (Arx Mentis)
Task Step: Use the Observation Matrix in the Analysis Room and speak with the holo